Heap-based buffer overflow in UltraVNC - CVE-2019-8262
Published: November 25, 2019 / Updated: November 27, 2019
Vulnerability identifier: #VU22964
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2019-8262
CWE-ID: CWE-122
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: ultravnc.sourceforge.net
Affected software:
UltraVNC
UltraVNC
Detailed vulnerability description
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error in VNC client code inside Ultra decoder. A remote attacker that controls a malicious VNC server can trick a user to connect to it, trigger heap-based buffer overflow and execute arbitrary code with privileges of the user, running the VNC client.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
How to mitigate CVE-2019-8262
Install updates from vendor's website.